Nontraumatic Brain

Acute left ACA and MCA territory infarct

Right PCA territory infarct

Left ACA territory infarct

Posterior inferior cerebellar artery (PICA) infarct

Internal capsule lacunar infarct

Superior cerebellar artery infarct

Lacunar infarct

Basilar artery thrombosis

Watershed territory infarct

Cardioembolic infarcts

Dural and deep venous sinus thrombosis

Diffuse cerebral edema

Hypertensive hemorrhage

Hemorrhagic metastasis

Hemorrhage secondary to amyloid angiopathy

Perimesencephalic non-aneurysmal subarachnoid hemorrhage

Dural venous sinus thrombosis

Anterior cerebral artery aneurysm rupture

MCA aneurysm rupture

Basilar tip aneurysm rupture

Herpes encephalitis

Brain abscess

Coalescent mastoiditis

Intracranial extension of sinusitis

Acute demyelinating disease (ADEM)

Posterior reversible encephalopathy syndrome (PRES)

Hydrocephalus

Metastatic breast cancer

Dural venous sinus thrombosis

Benign enlargement of the subarachnoid spaces of infancy (BESSI)

Coalescent otomastoiditis

Hypertensive basal ganglia hemorrhage

Petechial hemorrhage vs cortical laminar necrosis

Hemorrhagic conversion of an MCA infarct

Ruptured left PICA aneurysm

Artery of Percheron infarct

Dural venous sinus thrombosis

Post-infarct edema with herniation and ventricular entrapment

Severe hypoxic ischemic encephalopathy (HIE)

Cervical osteomyelitis and epidural abscess

Basilar artery tip thrombosis

No acute intracranial abnormality

Acute right MCA territory infarct (dense vessel sign)

Venous sinus thrombosis with associated hemorrhage and parenchymal edema

Deep vein thrombosis with hemorrhage

Cephalohematomas

Brain tumor, herniation, ventricular entrapment

No acute intracranial abnormality

Multiple cavernomas

Racemose neurocysticercosis

Acute left MCA/PCA and ACA/MCA watershed infarcts

Acute left caudate head infarct

Dural venous and cavernous sinus thrombosis

Sinusitis

Aneurysm

Posterior reversible encephalopathy syndrome (PRES)

No acute intracranial abnormality

Small left MCA territory infarct

Large left cavernous internal carotid aneurysm

Hypoxic-ischemic encephalopathy

Dural venous sinus and deep cerebral vein thrombosis with thalamic edema and trace hemorrhage

No acute intracranial abnormality

Diffuse cerebral edema

Ex vacuo ventriculomegaly vs normal pressure hydrocephalus

Cavernous malformation (aka cavernoma)

Dural sinus thrombosis with venous infarct and hemorrhagic transformation

Hypoxic-ischemic encephalopathy

Reversible cerebral vasoconstriction syndrome (RCVS)

Cerebellitis